The U.S. Army began broadcasting from London during World War II, using equipment and studio facilities borrowed from the British Broadcasting Corporation (BBC).
The first transmission to U.S. troops began at 5:45 p.m. on July 4, 1943 and included less than five hours of recorded shows, a BBC news and sports broadcast. That day, Corporal Syl Binkin
became the first U.S. Military broadcaster heard over the air. The
signal was sent from London via telephone lines to five regional transmitters to reach U.S. troops in the United Kingdom as they made preparations for the inevitable invasion of Nazi-occupied Europe.
Fearing competition for civilian audiences the BBC initially tried to
impose restrictions on AFN broadcasts within Britain (transmissions
were only allowed from American Bases outside London and were limited to
50 watts of transmission power) and a minimum quota of British produced
programming had to be carried. Nevertheless AFN programmes were widely
enjoyed by the British civilian listeners who could receive them and
once AFN operations transferred to continental Europe (shortly after
D-Day) AFN were able to broadcast with little restriction with
programmes available to civilian audiences across most of Europe
(including Britain) after dark.
As D-Day approached, the network joined with the BBC and the Canadian Broadcasting Corporation to develop programs especially for the Allied Expeditionary Forces.
Mobile stations, complete with personnel, broadcasting equipment, and a
record library were deployed to broadcast music and news to troops in
the field. The mobile stations reported on front line activities and fed
the news reports back to studio locations in London.